I dunno how you can say it'* a sin... you got crimpy connectors in your box. !!!!!!!
I've got them on my car too! Used on the headlights and fog lights from the bumper swap. Speakers in the trunk and the switched power from the radio. Nothing exceptionally sensitive. Not every wire needs to be soldered.
Actually they only run $60 or so, and was well worth it. Back when I was at the audio store I was doing a lot of soldering 10/12 gauge for subs, and was making quick work of those 20 gauge remote start wires. I entered the shop a crimper and left a year later a die hard solderer.
i cant believe the blasphemy going on here, i got over 200k on my 2.8 CS and 300k on my 3.1 GP never had any engine or head gasket issues. the engines were the only things that worked at that point though.